I heard some screaming and went back to check on my chicks (7 weeks old). I found them pulling on the bloody neck feathers of one of my girls! She has two puncture wounds on each side of her neck. Small, almost like a beak mark. Could they have done this? And then gone after her once they saw the blood? What can I do? They've never done anything like this before. I do have one chick that is a definite roo and he does tend to be aggressive, especially for a 6 week old. Did he maybe do this? I am getting rid of him as soon as I can, I just haven't found any takers yet. And how do I put her back in with holes in her neck?